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On 1月23日, the following important behind-the-scenes events were known to have occurred:
- 1965 - The Canadian Broadcasting Corporation became the first North American broadcaster of Doctor Who when it began airing early William Hartnell-era stories.
- 1970 - Location filming for The Ambassadors of Death took place. (REF: Doctor Who The Handbook: The Third Doctor)
- 1971 - Studio filming for The Claws of Axos took place at BBC Television Centre 3. (REF: Doctor Who The Handbook: The Third Doctor)
- 1973 - Studio filming for Planet of the Daleks took place at BBC Television Centre studio 4. (REF: Doctor Who The Handbook: The Third Doctor)
- 1981 - Studio filming for Logopolis took place at BBC Television Centre studio 6. (REF: Doctor Who The Handbook: The Fourth Doctor)
- 1996 - Location filming for the TV Movie took place. (Doctor Who The Handbook: The Seventh Doctor)
- 2001 - The Big Finish audio story The Time of the Daleks took place at the Moat Studios.
- 2003 - The Big Finish audio story Doctor Who and the Pirates took place at the Moat Studios.
- 2004 - The Big Finish audio story The Axis of Insanity was recorded at the Moat Studios.
- 2011 - Big Finish's Bernice Summerfield audio anthology Epoch was recorded.
- 2012 - The Big Finish audio story Gods and Monsters was recorded at the Moat Studios.
- 2016 - Big Finish's The Companion Chronicles audio anthology The Second Doctor: Volume One was recorded at the Moat Studios.
- 2018 - The Big Finish audio story An Ideal World was recorded at the Moat Studios.
- 2019 - The Big Finish audio story Memories of a Tyrant was recorded at the Moat Studios.
- 2020 - The second series of Big Finish's audio series Missy was recorded.
- 2020 - Big Finish announced the audio box set Susan's War.